Please note the following corrections for the indicated sections of the Guide:
Pentose Phosphate Pathway: a better name for the RPIA enzyme is phosphopentose isomerase (pages 65 and 66 in the print version).
Peroxisomes: HACL1 cleaves a formyl group from its substrate as formyl-CoA (page 575).
Stomach, Small Intestine, and Colon: the major source of GIP is the small intestine, not the stomach (page 726).
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